Opsgenie docs

@alq666 - I sent a draft of the OpsGenie docs for you to review in a non-GIT format on my week 2.  I know now to send it by way of pull request in Git.  Apologies for the first format!  I am not sure who would review this.  Would it be you, @adrienDog or @clofresh?  If needed, I can modify and then hopefully merge this to master.